Detroit — A suspicious package that briefly prompted the shutdown of a downtown street outside of a federal building Monday ended up being a dropped package from a mail carrier, police say.

A U.S. Postal Service carrier entered the building at 211 W. Fort at around 12:40 p.m., dropping a package, said Sgt. Patrick Neal of the Detroit Police Department. The 211 building has federal offices inside.

Within minutes the entrances and exits to the building were taped off and police, fire and Homeland Security vehicles lined Washington Boulevard and Fort Street. Bomb-sniffing dogs sniffed garbage cans nearby.

Then, the mail carrier came back and took responsibility for the dropped package. Once authorities confirmed that story, the dogs stopped sniffing, the fire trucks left, and the yellow tape came down.